# if
# def condition():
#     a = "hello"
#     b = a + " world"
#     if len(a) > 0:
#         x = b
#     elif 3 != 4:
#         x = 5
#     else:
#         x = 7
#     return x


# a = 3
# if (a == 3): 
#     a = 4
# else: 
#     c = a
# 创建示例
import pandas as pd
data = ["ab", "21"]
series = pd.Series(data, name='age')
print(series)